electron

physics : a very small particle of matter that has a negative charge of electricity and that travels around the nucleus of an atom

Full Definition of ELECTRON

: an elementary particle consisting of a charge of negative electricity equal to about 1.602 × 10−19 coulomb and having a mass when at rest of about 9.109 × 10−31 kilogram or about 1⁄1836 that of a proton

electron

Definition of ELECTRON for Kids

: a very small particle that has a negative charge of electricity and travels around the nucleus of an atom

Medical Dictionary

electron

nounelec·tron \i-ˈlek-ˌträn\

Medical Definition of ELECTRON

: an elementary particle consisting of a charge of negative electricity equal to about 1.602 × 10−19 coulomb and having a mass when at rest of about 9.109534 × 10−28 gram or about 1⁄1836 that of a proton